<html dir="ltr"><head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body style="text-align:left; direction:ltr;"><div>On Mon, 2019-07-01 at 14:10 -0400, Eric Kuzmenko via Librem-5-dev wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<br>
<br>
<div class="moz-cite-prefix">On 7/1/19 1:58 PM, Jeremiah C. Foster
via Librem-5-dev wrote:<br>
</div>
<blockquote type="cite" cite="mid:ebe3cf5cda39ada74a63c0d79f3e9dcc79564dd6.camel@puri.sm" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<pre>Hi,</pre><pre><br></pre><pre>I'm having some trouble with my devkit. It powers on (two lights behind</pre><pre>the battery holder turn on) when plugged into my laptop via USB but</pre><pre>doesn't boot. The 'boot mode' switch is set to eMMC and I've tested it</pre><pre>on USB as well, there's no discernable difference. </pre>
</blockquote>
Make sure you are using a USB 3.0 port to power it, a USB 2.0 port
will not provide enough power. If your USB 3.0 port doesn't work
then please use the wall wart we provided with the dev kit to make
sure it does actually boot up.<br></blockquote><div><br></div><div>The wall wart doesn't help sadly. </div><div><br></div><div><br></div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<blockquote type="cite" cite="mid:ebe3cf5cda39ada74a63c0d79f3e9dcc79564dd6.camel@puri.sm" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<pre>The reboot light flashes when the reboot button is pressed but there is</pre><pre>no change in the devkit. No haptic, no screen. </pre><pre><br></pre><pre>Similar behavior with power from a battery except with the battery</pre><pre>there is only one light lit. </pre>
</blockquote>
If the battery meets the specs we've outlined on the silkscreen and
in the documentation, and it is reasonably charged (3.7V~4.2V) then
it should be able to power the board. I suspect that either the
battery you are using does not meet the specs or it is not charged.<br></blockquote><div><br></div><div>I have a fresh 3500 mAh NL1835HP that turns the devkit light on but still no boot. I also reflashed the device yesterday (see discussion in dev/librem5 on Riot.)</div><div><br></div><div><br></div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<blockquote type="cite" cite="mid:ebe3cf5cda39ada74a63c0d79f3e9dcc79564dd6.camel@puri.sm" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<pre>I've found recently that one of the cables in the has come loose. I</pre><pre>managed to reattach it using the image in the documentation, so I think</pre><pre>it is connected corretly. </pre><pre><br></pre><pre>I'm going to reflash to see if that has something to do with my issue,</pre><pre>but that feels like a shot in the dark. If that doesn't work I guess I</pre><pre>need to soder a UART debug header.</pre></blockquote></blockquote><pre><br></pre><pre>I wonder if someone might recommend a good sodering iron kit for a n00b? Links to that and a UART header are most welcome.</pre><pre><br></pre><pre><div style="font-family: Cantarell; font-size: 16px;">Cheers,</div><div style="font-family: Cantarell; font-size: 16px;"><br></div><div style="font-family: Cantarell; font-size: 16px;">Jeremiah</div></pre></body></html>